ZDX V6-3.7L (2010)
Outside Temperature Display: Adjustments
Outside Air Temperature Indicator Calibration
NOTE: To test the outside air temperature sensor See: Heating and Air Conditioning/Testing and Inspection/Component Tests and General
Diagnostics/Outside Air Temperature Sensor Test.
Description
The outside air temperature sensor is located behind the center of the front bumper. The gauge control module uses measurements from this sensor to
display the outside air temperature.
Because of the location of the sensor, it may be affected by heat reflection from the road, engine and radiator heat, or hot exhaust from surrounding
traffic.
These conditions can heat soak the outside air temperature sensor and cause inaccurate readings. Logic has been written into the gauge control module to
help prevent abnormal or fluctuating outside air temperature indicator readings.
Outside Air Temperature Indicator Logic
Engine coolant temperature is 140 °F (60 °C) or higher:
Initial outside air temperature indication after the ignition switch is turned to ON (II), or the engine start/stop button is pressed to select the ON mode.
If the engine coolant temperature is 140 °F (60 °C) or higher when the ignition switch is turned to ON (II), or the engine start/stop button is pressed to
select the ON mode, the outside air temperature indicated the last time the key was turned off will be displayed regardless of the current temperature
measured by the outside air temperature sensor.
Engine coolant temperature is less than 140 °F (60 °C):
If the engine coolant temperature less than 140 °F (60 °C) or lower when the ignition switch is turned to ON (II), or the engine start/stop button is
pressed to select the ON mode, the current temperature measured by the outside air temperature sensor will be indicated.
Update to the outside air temperature indicator while driving
Engine coolant temperature is 140 °F (60 °C) or higher:
If the temperature measured by the outside air temperature sensor is greater than the temperature on the outside air temperature indicator, the outside
temperature indicator will increase by 1 °F (1 °C) per minute after the vehicle speed is greater than 19 mph (30 km/h) for more than 1 minute and 30
seconds. It will continue to increase until the current outside air temperature is indicated. So, the first change to the outside air temperature indicator is 1
minute and 30 seconds after the vehicle speed is greater than 19 mph (30 km/h). If the vehicle speed drops below 19 mph (30 km/h), the indicator will
not update again until the vehicle speed is increased to 19 mph(30 km/h) or more for more than 1 minute and 30 seconds again.
Engine coolant temperature is less than 140 °F (60 °C):
If the engine coolant air temperature is less than 140 °F (60 °C), the temperature displayed increases 1 °F (1 °C) every 2 seconds until the current outside
air temperature is displayed.
If the outside air temperature is less than the indicated temperature, the temperature will decrease 1 °F (1 °C) every 2 seconds until the current outside air
temperature is indicated regardless of vehicle speed.
Troubleshooting
If the indicator displays "- - -" for more than 2 seconds after selecting the outside air temperature display mode, the gauge is not receiving the outside
temperature data from the climate control unit over the B-CAN. Check the climate control system or multiplex integrated control system for DTCs (see
B-CAN System Diagnosis Test Mode A) See: Powertrain Management/Computers and Control Systems/Information Bus/Testing and
Inspection/Component Tests and General Diagnostics/Troubleshooting - B-CAN System Diagnosis Test Mode A.
Calibration
The outside air temperature indicator's displayed temperature can be recalibrated ±5 °F or ±3 °C using the MID to meet the client's expectations. See the
owner's manual for more information.
